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   1  /*
   2  * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file COPYING in the main directory of this archive
   6  * for more details.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11 #include <linux/sched.h>
  12 #include <linux/kernel_stat.h>
  13 #include <linux/interrupt.h>
  14 #include <asm/segment.h>
  15 #include <asm/intersil.h>
  16 #include <asm/oplib.h>
  17 #include <asm/sun3ints.h>
  18 #include <linux/seq_file.h>
  19
  20 extern void sun3_leds (unsigned char);
  21
  22 void sun3_disable_interrupts(void)
  23 {
  24         sun3_disable_irq(0);
  25 }
  26
  27 void sun3_enable_interrupts(void)
  28 {
  29         sun3_enable_irq(0);
  30 }
  31
  32 int led_pattern[8] = {
  33        ~(0x80), ~(0x01),
  34        ~(0x40), ~(0x02),
  35        ~(0x20), ~(0x04),
  36        ~(0x10), ~(0x08)
  37 };
  38
  39 volatile unsigned char* sun3_intreg;
  40
  41 void sun3_enable_irq(unsigned int irq)
  42 {
  43         *sun3_intreg |=  (1 << irq);
  44 }
  45
  46 void sun3_disable_irq(unsigned int irq)
  47 {
  48         *sun3_intreg &= ~(1 << irq);
  49 }
  50
  51 static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
  52 {
  53         *sun3_intreg |=  (1 << irq);
  54         if (!(kstat_cpu(0).irqs[irq] % 2000))
  55                 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]);
  56         return IRQ_HANDLED;
  57 }
  58
  59 static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
  60 {
  61 #ifdef CONFIG_SUN3
  62         intersil_clear();
  63 #endif
  64         *sun3_intreg |=  (1 << irq);
  65 #ifdef CONFIG_SUN3
  66         intersil_clear();
  67 #endif
  68         do_timer(fp);
  69 #ifndef CONFIG_SMP
  70         update_process_times(user_mode(fp));
  71 #endif
  72         if (!(kstat_cpu(0).irqs[irq] % 20))
  73                 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
  74         return IRQ_HANDLED;
  75 }
  76
  77 static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp)
  78 {
  79 //      intersil_clear();
  80         return IRQ_HANDLED;
  81 }
  82
  83 static void sun3_inthandle(unsigned int irq, struct pt_regs *fp)
  84 {
  85         *sun3_intreg &= ~(1 << irq);
  86
  87         m68k_handle_int(irq, fp);
  88 }
  89
  90 static struct irq_controller sun3_irq_controller = {
  91         .name           = "sun3",
  92         .lock           = SPIN_LOCK_UNLOCKED,
  93         .startup        = m68k_irq_startup,
  94         .shutdown       = m68k_irq_shutdown,
  95         .enable         = sun3_enable_irq,
  96         .disable        = sun3_disable_irq,
  97 };
  98
  99 void sun3_init_IRQ(void)
 100 {
 101         *sun3_intreg = 1;
 102
 103         m68k_setup_auto_interrupt(sun3_inthandle);
 104         m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7);
 105         m68k_setup_user_interrupt(VEC_USER, 192, NULL);
 106
 107         request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL);
 108         request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL);
 109         request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL);
 110 }